Elevator-door-controlling means



Sept. I1, 1923. 1,467,692

R. w. SCOTT V ELEVATOR DOOR CONTROLLING MEANS Original Filed April 11, 1916 5 Sheets-Sheet 1 luucuror Sept. 11, 1923. 1,467,692

R w. SCOTT ELEVATOR DOOR CONTROLLING MEANS Original Filed April 11 19 16 5 Sheets-Sheet 3 5m; win 6 as w a M Sept. 11, 1923. 1,467,692

R. w. SCOTT ELEVATOR DOOR CONTROLLING MEANS Original Filed April 11, 1916 5 Sheets-Sheet 4.

gull" "Nil " m ll Sept. 11, 1923. 1,467,692

R. w. SCOTT ELEVATOR DOOR CONTROLLING MEANS 11 c H To: LU. (20% E151) GHQ: news Patented Sept. 11, 1923.

UNITED STATES PATENT OFFICE.

BUMSEY W. SCOTT, OI MONTCLAIR, NEW JERSEY, ASSIGNOR TO ELEVATOR SUPPLIES COMPANY, INC., A CORPORATION OF NEW JERSEY.

ELEVATOB-DOOR-CONTROLLING MEANS.

Application filed April 11, 1916, Serial No. 90,298. Renewed October 29, 1921. Serial No. 511,441.

T 0 all whom it may concern.

Be it knownthat I, RUMSEY W. Soon, a citizen of the United States, residing at Montclair, New Jerse have invented certain new and useful mprovements in Elevator-Door-Controlling Means, of which the following is a clear, full, and exact description.

This invention relates to elevator door controlling means and articularly to means for effecting at the wil of the operator of the eievator car an automatic opening or closing of the door or doors at any floor.

A general object of the invention is to pro vide compact and eflicient elevator door operating meanswhich can easily be incorporated either in new or in old elevator installations.

Another object of the invention is to provide improved elevator door operating means which will not interfere with the operation of the door by hand, if for any reason it is necessary or desirable that the door he thus operated, and yet which will instantly be available for automatic operationof the door at any selected floor.

As hereinabove suggested, the invention aims to provide elevator door operating means which may be incorporated in old elevator installations as well as in new installations, and an important feature of the invention is the compact construction and arrangement of the means for operating the door at each floor and of the means for transmitting power to the door operating means, whereby the said means may be installed in the space ordinariiy provided between the elevator car and the walls of the elevator shaft or well. Another important feature of the invention is the employment of vertically moving power transmitting means extending verticaily through the shaft and so constructed and so connected to the door operating mechanism at each floor that provision may readily be made for variable movement of the doors of different floors for a constant movement of said transmitting" means.

In the illustrative embodiment, the invention is shown as applied in the operation of vertically moving doors or gates such as are tn'dinarily employed to ciose the hatch ways of freight elevator shafts. and another object of the invontion is to provide im proved door operating means which will be especially useful in operating doors or gates of this type.

The invention aims also to insure the proper timing and direction of the move ments of the operating. parts, to control the applicatio of power with respect to both the inertia of the parts to be moved and the desired speed at diii'crent parts of such movement, and in general to insure that neither the operation of the door operating mechanism nor its possible failure to operate shall cause injury to the structure or inconvenience to the operator.

Other objects and important features of the invention will appear from the followingdescription and claims when considered in connection withthe accompanying drawings, in which Fig. 1 is a sectional view through an elevator shaft showing the invention applied to the operation of vertically separable doors or sites;

Fig. 2 is a view looking out from the inside of an elevator shaft. showing the in vention applied to a single vertically movable gate;

Fig. 3 is a detail view showing the means for connecting the power operated means to the door operating mechanism at a selected floor, and the means upon the elevator car for controliing such connection;

Fig. 4 is a sectional detail on the line 4-4 of Fig. 6;

Fig. 5 is a front elevation of the operating clutch;

Fig. 6 is side elevation of the operating ciutch Fig. 7 is a sectional view through the op erating clutch and the door frame. this view showing also a portion of one of .he doors:

and

Fig. 8 is a wiring diagram, this view show ins also diagrammalicnily means for con trolling the timing of the operation of the various p: and their speed of operation.

in the. em...

particularl in Fig. 7 of the drawings, the sprocket w I eel 8 has a hub 10 provided with a friction face 12 and supported upon ball bearings 14 upon astationary shaft 16 carried by a bracket 18 which may be attached to the door frame 20 or other part of the elevator shaft 21. The cone 22 of the ball hearing has preferably a fixed location upon U s shaft 16, and the sprocket wheel 8 is confined to its bearing upon the cone by the flange 24 of the bearing cage, the sprocket wheel being thus confined against movement lengthwise of the shaft 16.

Also mounted upon the shaft 16 is a second sprocket wheel 26, which has a hub 28 presenting a friction plate 30 covered with friction material 32 opposed to the friction face 12 of the hub 10 of the sprocket wheel.

8. The sprocket wheel 26 is likewise carried upon a ball bearing upon the shaft 16, but the cone 34of this hearing is preferably movable lengthwise of the shaft 16 to bring the friction clutch surface 32 of the sprocket Wheel 26 into engagement with the clutch surface 12 of the sprocket wheel 8. The flange 36 of the bearing cage in the hub 28 of the sprocket wheel 26 projects over a shoulder upon the cone 34 and thus confines the sprocket wheel 26 upon the cone 34.

A frictional connection in the driving connection operating the doors is desirable because it is customary to have a. positive door stop limiting the opening movement of the doors, and it is difiicult to have the amount of dg ive of the door opening mechanism so nicely adjusted that the doors will always open the exact amount necessary. With a frictional drive in the connections, any overrunnin will be takencare of by a slip of the friction clutch, and while in the particular embodiment of the invention shown, I have shown the friction connections as individual clutches controlling each pair of gates, it is obvious that a friction clutch may be interposed anywhere in the drive between the motor 46 hereinafter described and the sprockets directly connected to the gates. Of course, if a friction clutch were used elsewhere in the connections from the motor 46,

the individual clutches controlled at each door opening would not necessarily be friction clutches.

A sprocket chain 38 engages the sprocket wheel 26 and serves to impart movement to said sprocket wheel 26, which movement may be transmitted to the sprocket wheel 8, an thus serve to move the doors or gates 2 and 4 into open or closed position, when the clutch surfaces 32 and 12 are brought into clutching relation to each other. The sprocket chain 38 is a part of flexible power transmitting means extending verticall through the elevator shaft, said means pre erably comprising a rope 46 having chain sections 38 at each floor. The rope 40 may pass over a pulley or sheave 42 upon a shaft 44 at the upper end of the elevator shaft or well 21, and rotary movement ma be imparted to the shaft 44 by any suitab emeans, the illustrated means comprising an electric motor 46 which drives a worm gear 48 upon the shaft 44 by means of a worm 50. The motor 46 is preferably so connected that its direction of rotation may be reversed so that the rope 40 may be moved vertically in either direction in the elevator shaft 21. Aweight 52 carried by a pulley or sheave 54, supported by the rope 40 at its lower end, serves to keep said rope taut. A guidewa 56 provided in a lateral projection 58 of t e bracket 18 serves to keep the chain 38 in enga ement with the sprocket wheel 26, this gui eway bein wide enough to permit the movement of t e sprocket wheel 26 into clutching relation to the sprocket wheel 8.

The means for effecting the movement of the sprocket'wheel 26 into clutching relation to the sprocket wheel 8 preferably comprises means arranged to be engaged by a part upon the elevator car as the car is approaching the floor at which the door is to be opened, the illustrated means comprising a levcr60 which embraces the shaft 16 and receives trunnions 62 of a slidable collar 64, confined upon the shaft 16 by a plate or disk 66 held in position by a screw 68, the collar 64 being arranged to bear against the cone 34 of the bearing of the sprocket wheel 26 and as it is moved by the lever 60. to impart movement to said cone lengthwise of the shaft. The lever 60 is forked at its lower end and embraces a spring socket 70 in which is confined a spring 72, the socket being carried by the bracket 18. The sides of the spring socket 70 are slotted at 74 and a pin 76 connecting two links 78, which at their forward ends are pivoted to the respective fork members of the lever 60 by means of pivot pins 80, bears against a plunger 82 resting against one end of the spring 72, the other end of the spring bearing against the removable bottom 84 of the spring socket. At its upperend the lever 60 is also forked and carries a roller 86 upon a shaft 88 extending between the fork members. The roller 86 is arranged to be engaged by the clutch operating part upon the car, hereinafter to be described.

From the foregoing description it will be seen that the local door operating mechanism and the means for transmitting power to this operating mechanism is very compact and simple in construction and can easily be incorporated in old elevator installations as well as new, and can be utilize either in connection with automatic elevators or in connection with elevators in which the control of the opening and closing of the door is left entirely to the operator. It will fur- ..ther be seen that by the employment of sprocket wheels in the manner shown and described, provision may readily be made for different ranges of movement of the doors upon different floors for the same vertical movement of the power transmitting means, such difi'erences in the range of movement being attained simply by providing sprocket wheels of different sizes upon the different floors.

In the illustrative embodiment of the invention, the clutching of the local door operating mechanism to the power transmitting means is preferably effected by a cam 90, or other suitable means carried by the car, which engages the roller 86 of the lever and rocks this lever about its fulcrum 80 upon the links 78, thus moving the sprocket wheel 26 into clutching relation to sprocket wheel 8. In this embodiment of the inven tion the positioning of the cam 90 is under the control of the operator of the car and is preferably effected by electrical means, the illustrated means comprising a solenoid 92 having a movable core 94 connected to one arm of a bell crank 96 fulcrumed at 98 upon the top of the car 90. The other arm of the bell crank 96 carries a vertical link 100 which is pivoted to the knee joints of two toggles I02 and 104. The toggles 102, 104, are each pivoted at one end upon a plate 106 carried upon the upper end of the car, and at their outer ends are pivoted to a movable cam-carrying member 108 slidably mounted upon the plate 106, the illustrated member 108 being carried by rods 110, 112. guided in slideways 114, 116, upon the plate 106. The cam 90 is likewise mounted on stems or rods 118 which slide in guides in the member 108 and are surrounded by springs 1520. which serve to keep the cam 00 yieldingly spaced from the member 108.

In the preferred embodiment of the in vention, the operating motor and the power transmitting means are preferably normally stationary and are preferably arranged to be actuated only after the operator has operated the mechnism for selecting the floor at which a door is to be opened To this end a break is preferably provided in the circui to the operating motor 46, which break preferably only closed after the engagement of the clutch setting means at a particular floor by the cam 00. in him of the drawings, the arrangement oi th lcctrical circuits and of the means in or car for controlling these circuits istrstcd. The elevator car is provided 1 ii! an up button 122 and a down but 1 1:24. The

up button is intended to co the open-- 1112' of the door or suite. ar dowid i gate. a

. iarily for two mag ioid 953,

, any of button the closing of the do third button 126 is intended i cnicrgcnry use and controls nets Q36 and H30 and also ti hen opened; it serves to rice these magnets which may at that time be energized. Deenergizing these magnets not only will stop the motoxybut will also, in the present embodiment, disconnect the gate from the chain 38.

Referring to Fig. 8 of the drawings, it will be seen that the invention contemplates the provision of up and down limit switches 128 and 130 respectively, which may be operated by a ball or knot 132 on the rope 40, speed controlling resistance 134 which may be cut into and out of the shunt field 136 of the motor 46 b an arm 138 also carried by the rope 40 and an electrical interlock to insure the sending of the current through the power-operated means in the right direction, this interlock being preferably combined with the circuit changing mechanism 140. The motorcircuitpreferably also includes starting resistance 142 controlled by a spark gap cut-out 144, a brake magnet 146, and a break at 147 which is closed by the cam 90 when this cam engages the roller 86 on the lever 60.

The current for operating the motor and the other electrical devices shown may come from any suitable source connected to the terminals 148 and 149. Referring to Fig. 8 of the drawings, when the operator is approaching a floor at which he intends to' straightening the toggles 102 and 104 and bringing the cam 00 into position to engage the roller" 86. As the car approaches the iioor at which the door is to be opened, the rain 90 will engage the roller 86 and eii'ect the clutching of the sprocket wheel 26 to the sprocket Wheci 8. This engagement of e cam 90 with roller will also cause tuisprings 120 to be compressed until the break 147 in the motor operating circuit is closed, A motor-actuating circuit will then he closed as follows: Beginning at the terininal 148, the circuit runs through 150, 151, 154, 156 and the righthand contact of the upper iiniit switch 128, through 166. the bridge 16? of the left-hand member of the clcctrical interlock, through 168, and the H1 llt'llOlll 16! of the combined circuit changing mechanism and interlocking means through 170. 172. the closed break 147, and through wires 164, 165, back to the other terminal 149. The closing of the circuit through the solenoid 169 causes it to the rod 1T1 which carries the right-hand bridge 176 of the electrical interlocking means and also the bridges 178 and 180 for the right-hand switch of the c rcuit-changing mechanism. The lifting of these bridges 17S and 180 completes another circuit, as follows: from the terminal 148, tirough the switch 150, through wires 151, 1 2, 184, resistance 142, wires 186, 188, through bridge 178, wires 190, 192, brush 194, armature of the motor 46, brush 196, wires 198, 200, bridge 180, wires 202,165, and switch 150 back to the terminal 149.

The spark gap cutout 144 is in a shunt circuit between the brushes 194 and 196, this circuit running through wires 192, 204, 206 and 198. As the counter electro-Inotive force in the motor builds up, the successive sections A, B, C and D of the resistance 142 are cut out.

The field 136 of the motor 46 is a shunt field, and in the position of the parts shown in Fig. 8, the resistance 134 is cut out by the bridge arm 138 which engages the two contacts 208 and 210, the shunt circuit being completed through wires 212, 214 and 216. lVhen the rope 40 moves up, it carries the arm 138 out of engagement with the contact members 208, 210, and the resistance 134 is \hen cut into the circuit of the shunt field 1116. This causes the speed of the motor to in zrease and the motor continues to run at a 18.812 speed until the arm 138 engages the up er pair of contacts 218, 220. The resistance 134 is then again cut out of the circuit if the shunt field 138, the circuit being now romplete'd through the contact member 208, i he wire 222, contact member 218, bridge arm 138, contact member 220, wire 224, and Wire 216. As the rope 40 approaches the upper limit of its movement, the ball 132 engages the upper limit switch 128 and breaks the motor circuit at this point. The opening of this switch also breaks the circuit through the cam solenoid 92 and permits the cam to return to its inoperative position.

Each of the switches 128 and 130 is pro vided with a spring which tendsto move the switch to closed position, the upper switch 128 being provided with a spring 129 and the lower switch 130 with a spring 131. As the rope 40 moves upward, the lower switch 130 closes under the action of its spring 131 so that a circuit may now he closed through the down button .124. This circuit would be as follows: through switch 150, wires 151, 152, 154, down button 124. wires 226, 228, down limit switch 130, wire 230, cam solenoid 92, wire 162, wires 164, 165, switch 150 and back to the terminal 149.

The closing of the circuit through the cam solenoid 92 closes the break 147 as hereinabove described, and a motor actuating 'circuit through the down button is thus Starting at terminal 148,

established as follows: from terminal 148 to switch 150, wires 151, 152, 154, button 124, wires 226, 232, bridge 176, wires 234, lefthand solenoid 236 of the current reversin mechanism, wires 238, 172, across the closed break 147 and back by wire 164 and switch 150 to the other terminal 149.

The closing of the circuit. through the solenoid 236 causes the lifting of the rod 240 which carries bridges 242 and 244 of the left-hand switch of the current-changing mechanism, and a motor operating circuit is thus completed as follows: from the terminal 148 to switch 150, wires 151, 182, 184, resistance 142, wires 186, 246, bridge 242, wire 200, 198, to brush 196, through the armature of the motor 46, to brush 194, through wires 192, 190, bridge 244, wires 202 and 165, and switch 150 back to the terminal 149.

It will be noted that the motor operating circuit completed when the down button is pressed goes through the armature in a direction opposite to that of the circuit completed when the up button is pressed. It will also be noted that a motor operating circuit can be completed only when one or the other of the limit switches 128 and 130 is closed, and that the direction of movement depends upon which switch is closed, thereby preventing the actuation of the mechanism to move the door beyond either its closed or its open position. Moreover, when the up button 122 is pressed, the closing of the circuit through the solenoid 169 raises the bridge 176 and prevents the closing of a motor circuit by pressing the down button 124. Likewise. when the down button 124 is pressed, the raising of the bridge 167 by the closing of the circuit through the solenoid 236 prevents the closing of the motor circuit through the up button 122.

Although, as above pointed out, the motor operating circuit which is completed when the down button is pressed, goes through the armature in a direction opposite to that of the circuit completed when the up button is pressed, provision is made for maintaining the direction of the circuit completed through theshunt field 136. To this end switches are arranged to be closed by the respective left-hand and right-hand bridge members 167 and 176 when either of these members is raised, each of these switches closing a circuit running through the field 136 by means of the wires 151, 152. 245, field 136. resistance 134, and wires 248, 247, 202 and 1.65. It will be seen from an inspection of this circuit always runs through the field 136 in the. same direction whether it be closed by the bridge member 167 or the bridge member 176.

From the foregoing description it will Fig. 8 of the drawings that Leave? be seen that the elevator doors are free to be operated by hand at all times except when one or the other of the buttons 122 and 124 is pressed, and that, therefore, in the event of the failure of the automatic mechanism to act, the operator may open and close the doors by hand. It will further be seen that the proper sequence of operations is assured, in that the power-operated means cannot be actuated until the cam 90 has been set in position to effect the clutching of the power-operated means to the. local door-operating means. Moreover, by reason of the provision of speed controlling means, direction controlling means, etc, the mechanism is substantially foolproof.

It will be noted that the sprocket wheels 8 and 26 rotate in planes which are substantially parallel to the plane in which the elevator door moves. This arrangement in combination with the vertical movement of the power transmitting means effects a great saving in the space required for the connection between the power-op eratcd means and the local door'operating means, thus, as above suggested, permitting the incorporation of the mechanism in old installations. As herein shown, the mechanism is particularly useful for operating vertically movable doors, such, for example, as the Well known Peelle doors, and as shown in Fig. 2 of the drawings, it is useful not only in operating vertically separable doors, where one door counterbalances the other. but it is equally useful in operating a single vertically movable gate 260 which may be counterbalanced by a weight 262 so that when the power-operated means is disconnected from the local gate lifting mechanism, the gate may be moved freely by hand and will stay in any position to which it is moved. This gate 260. like the doors shown in Fig. 1, is preferably operated by means of a sprocket chain 264 passing over the sprocket wheel 8 of the local operatim mechanism.

An important feature of the invention is the use of a vertically movable, flexible, power-transmitting means. lly havingthe power-transmitting means moved vertically in the elevator shaft and likewise having the mechanism through which the movement of this means is transmitted to the door comprised of parts turning about horizontal axes, the space requirements of parts turning about vertical axes are avoided.

Although as above suggested, the use of a flexible, vertically movable power-transmittine means is an important feature of the invention, it will be understood that the invention is not restricted to the illustrated emho d i in cut.

What I claim as new is:

1. Elevator door-controlling means comvalor shaft, normally freely movable doorans at each floor, and -means operating m lv connecting said power-opfor friction:

eratcd means to the door-operating means of any floor for movement of said door in either direction and for automatically interrupting said connection at the end of such movement.

3. Elevator door-controlling means comprising normally stationary, vertically movable power-operated means extending vertieally through the elevator shaft, said means being 'movable in either direction, door-operating means at each floor, means for con necting the door-operating means at any tloor to said power-operated means, means for actuating said power-operated means, and means for automatically interrupting said connection when said power-operated means completes its movement in either direction.

4-. Elevator dooncontrolling means comprising normally stationary, reversible power-operated means extending vertically through the elevator shaft, door-operating means at each floor, means for connecting said power-operated means to the door-opera-ting means of any floor, means for determining the direction of movement of the power-operated means, means whereby the connection determines the time of actuation of the power-operated means, and means for automatically interrupting said connection at the end of the movement of the door-operating means in either direction.

5. In elevator door controlling means, the combination with a vertically movable counter-balanced door, normally freely movable, of reversible power-operated means, and means for connecting said power-operated means to said door for opening and closing said door and for disconnecting said power-operated means from said door to permit it again to be freely moved at the end of each opening or closing movement thereof.

6. In elevator door controlling means, in combination with a vertically movable counter-balanced door and means for moving said door, reversible power-operated means normally disconnected from said door-operating means, means for effecting a frictional operating connection between said power-operated means and said dooroperating means for a predetermined movement of said power-operated means in either direction, and means for automatically interrupting said connection at the end of said movement,

7. In elevator door controlling means, the combination with a vertically movable counter-balanced door, of a flexible connection between said door and its counter-balan'ce, a member rotated by the relative movement of said door and said counterbalance, power-operated means extending vertically through the elevator shaft, and means for effecting an operative connection between said power-operated means and said rotatable member for a predetermined movc ment of said power-operated means in either direction and for automatically interrupting said connection at the end of said predetermined movement.

8. Anapparatus of the class described, in combination with an elevator car and hatchway doors, door-operating means at each floor, reversible vertically movable power transmitting means extending vertically through the elevator shaft and normally disconnected from the door-operab ing means, means carried by the elevator car and under the control of the operator for effecting a connection between said door operating means and said power transmitting means, means whereby the operator controls both the actuation and the direction of the movement of ,said power transmitting means, and automatic means for disconnecting said door operating means from said power-transmitting means at the end of the movement of the door in either direction.

9. Elevator door-controlling means, comprising vertically movable power transmitting means extending vertically through the elevator shaft, normall stationary electrically operated means or imparting movement to said transmitting means in either direction, elevator door operating means at each floor comprising a friction clutch, one member of which is connected to said transmitting means and normally disengaged from the other member, an elevator car and a solenoid controlled cam carried by said car for setting said friction clutclnand means also controlled by said solenoid for determining the time of operation of the electrically-operated means.

10. In apparatus of the class described, in

' combination with an elevator car and batchway doors, door operating means at each floor, electrically actuated power-operated means extending vertically through the elevator shaft, means comprising a clutch at each floor for effecting a connection between the local operating means and said power-operated means, an electrically controlled cam upon the elevator car for. operating a selected clutch, and means comprising a circuit partially completed by the actuation of said cam for insuring the setting of the clutch before the actuation of the power-operated means.

.11. In apparatus of the class described, in combination with an elevator car and hatchway doors, door operating means at each floor, power-operated means extending vertically through the elevator shaft, a clutch at each floor for effecting a connection between the local operating means and said power-operated means, means comprising a solenoid carried by the car foreffecting the setting of the clutch as the car approaches a selected floor, an electric motor for imparting movement to said power-operated means, electric circuits for energizin said solenoid and actuating said motor and a switch in the car for controlling both said circuits.

12. In apparatus of the class described, in combination with an elevator car and hatchway doors, door-operating means at each floor, normally stationary reversible electrically actuated power-operated means extending vertically through the elevator shaft and normally disconnected from the door-operating means, a clutch at each floor for connecting said local operating means to said poweroperated means, means carried by the car and movable into and out of operative position for effecting the setting of the clutch at a selected floor, electrically operated means operable at any point in the movement of the car for setting the clutch-operating means, and means comprising a circuit partiall completed by the actuation of the clutch setting means and completed by the clutch-settin operation for actuating the power-operated means.

13. In apparatus of the class described,

in combination with an elevator car and hatchway doors, door-operating means at each floor, reversible power-operated means extending vertically through the elevator shaft, a'clutch at each floor for efi'ectin a.

ating said motor to move the ower-operated means in the other direction.

14. In apparatus of the ridescribed in combiiaition with an eh a car and hatchv doors, door-operating means at each ivlwi, reversible power-operated means extend g vertically through the elevator shaft, a. clutch at each floor for effecting a connection between the local operating mean; and said power-operated means, means comprising a solenoid for setting the clutch at a selected floor, an electric motor for imparting movement to said power-operated means, a switch carried by the car for setting a selected clutch and actuating said motor to move the power-operated means in one direction, a second switch carried by the car for setting a selected clutch and actuating said motor to move the power-operated means in the other direction, and a third switch carried by the car for stopping said power-operated means at any point in its movement.

1a In apparatus of the class described, in combination with an elevator car and hatchway doors, means under the control of the operator of the car for automatically or closing a selected door, said means comprising a reversible motor and circuit-(shangha H105? cs. means controlled by the extent of mover-wit transmitted to the door or doors to be: moved for dctcrming the speed of the motor at different points in its movement. and means controlled by a predetermined motor movement for breaking the motor-operating circuit.

16. In apparatus of the class described, in combination with an elevator car and hatchway doors, means under the control of the operator of the car for automati cally opening or closing a selected door, said means comprising a reversible motor and power-transmitting means extending through the elevator shaft, and means connected to said power-transmitting means for breaking the mot-or operating circuit and etfecting the disconnection of said powertransmitting means from said door as the door comes to either of its limits of movement.

17. In apparatus of the class described, in combination with an elevator car and hatchway doors, means under the control of the operator of the car for antomaticaily opening or closing a. selected door, said means comprising a reversible motor and power-transmitting means extending through the elevator shaft, means connected to said power-transmitting means for varying the speed of the motor at different points in the movement of the door, and means also connected to said power-transmitting-means for breaking the motor-operating circuit as the door approaches its limit of movement in either direction.

18. In apparatus of the class described. 5 in combination with an elevator car and hatchway doors, means under the control of the opera or of the car for automatically opening or closing a selected door, said means romprising a cam carried by the car, a solenoid for operating said cam, a reversible electric motor and power-transmitting means extending through the elevator shaft, means controlled by the position of said power-transmitting means for determining the direction of rotation ofsaid motor, and means controlled by said solenoid for determining the time of actuation of said motor.

19. In apparatus of the class described in combination with an elevator car and hatchway doors, means under control of the operator of the car for automatically opening or closing a selected door, said means comprising a reversible electric motor and means for connecting said motor to the se lected door, and means comprising switches controlled through the movement of said connecting means for limiting the extent of movement of said motor and for insuring a movement of the motor in a direction to carry said door from one of its limits of movement to the other.

20. In elevator door controlling means, a sliding: doon normally disengaged clutch avhccis rotatable in planes parallel to the plane of mm tenant of the door, one of said wheels being connected to the door, reversible power-operated means connected to the other clutch wheel, means under the control of the operator of the car for effecting the movement of said clutch wheels into clutchin relation, means also under the control of the operator of the car for controlling the direction of movement of the power-op erated means, and automatic means for effecting the disengagement of said clutch wheels at the end of the movement of said door in either direction.

21. In elevator door controlling means, in combination with the elevator car and the hatchway doors, co-axial clutch wheels at each floor relatively movable aiong' their common axis into clutching relation, one of said wheels being connected to the door and power-operated means constantly connected to the other wheel, said wheels bein rotatable in planes parallel to the plane of movement of the door, means, comprising a cam carried by the car, for effecting the relative movement of said wheels into clutching relation, and means for automatically effecting the unclntching of said wheels after the door has couipieted its movement in either direction.

22, In elevator door-controlling means, dooroperating means at each floor, said means comprising coaxial, normally disengaged friction members, one of which is connected to the door, normally stationary vertically movable power-operated means extending through the elevator shaft and connected to theother friction member, an elevator car, means carried by the car for effecting a relative movement of said members into frictional engagement, means, also carried by the car, for controlling the actuation of said power-operated means, and independent means for automatically disconnecting said friction members and stopping said power-operated means after the door has completed its movement in either direction.

23. In elevator door controlling means, in combination with the elevator car and the hatchway doors, flexible power transmitting means extending vertically through the elevator shaft and vertically movable therein, a wheel connected to said power transmitting means at each floor and rotatable in a plane parallel to that in which the door moves, a second wheel at each floor connected to the door and rotatable in a plane parallel to the aforementioned plane, means under the control of the operator in the car for eii'ecting an axial relative movement of said wheels into frictional engagement whenever the door at any floor is to be opened, and independent means forautomatically interrupting said connection when the opening movement of the door has been completed.

24. In elevator door controlling means, in

combination with the hatchwav doors, door operating mechanism at each floor comprising a sprocket wheel rotatable in a plane parallel to that in which the door moves, a second co-axial sprocket wheel located adjacent thereto, said wheels being relatively movable along their common axis into clutching relation to each other, a sprocket chain through which Said first-mentioned wheel is constantly connected to the door, and a vertically arranged power-driven sprocket chain connected to said second mentioned sprocket wheel, and comprising a part of a single, flexible. power-operated means common to all the door-operating mechanisms.

25. Elevator door controlling means comprising normally inoperative power operated means extending vertically through the elevator shaft and movable in opposite direc tions, door operating mechanismat each fioor, means for connecting any'door operating mechanism with said power operated means, and means including frictional driving means for causing a predetermined movement of said door in whichever direction selected and then automatically disconnecting said power operated means from said door operating mechanism.

26. In apparatus of the class described, in combination with an elevator car and hatchway doors, means under the control of the operator of the car for automatically opening or closing a selected door, said means power transmitting means, for varying the speed ofthe motor at different points in the movement of the door, and means also operated through the movement of said power transmitting means and arranged to break the motor operating circuit as the door approaches its limit of movement in either direction.

28. In apparatus of the class described, in combination withan elevator car and hatchway, a pair of doors for said hatchway at each floor arranged to move vertically in opposite directions to open and close the hatchway opening, connections for operating one of said doors simultaneously with the other door through movement imparted to the latter door, means for automatically opening or closing a selected pair of doors, said means comprising a motor and power transmitting means extending through the elevator shaft, means operated through the movement of said power transmitting means for varying the speed of the motor at different points in the movement of the doors of said pair, and means also operated through the movement of said power transmitting means for breaking the motor operating circuit as the doors of said pair ap proach their limits of movement in either direction.

29. In apparatus of the class described in combination with an elevator ear and a hatchway serving several floors, a pair of doors for said hatchway at each floor arranged to move in opposite directions to open and close the hatchway opening, connections for operating one of said doors simultaneously with the other door through movement imparted to the latter door, a motor and power transmitting means extending through the elevator shaft and common to all the doors, at each floor a clutch for at or adjacent said floor, the doors at the other floors remaining disconnected from said power transmitting means.

30. In apparatus of the class described in combination with an elevator car and a hatchway serving several floors, a pair of doors for said hatchway at each floor arranged to move in opposite directions to open and close the hatchway opening, connections for operating one of said doors simultaneously with the other door through movement imparted to the latter door, a reversible motor and power transmitting means extendin vertically through the elevator shaft and common to all the doors, and means for automatically connecting a pair of doors at a selected floor with said power transmitting means to open said doors only when the car is located at or adjacent said floor, the other doors remaining disconnected from said means and means also under control of the operator for reversing the motor and drivin the gate to its close position through sai power transmitting means.

31. In elevator door controlling means in combination with the hatchway doors. door operating mechanism at each floor comprising a wheel rotatable in a plane parallel to that in which the door moves, a co-axial sprocket wheel located adjacent thereto, said wheels being relatively movable along their common axes into clutching relation to each other, means comprising a flexible connecting member by which said first men tioned wheel is constantly connected to .the door, and a vertically arran d power driven sprocket chain connects to said second mentioned sprocket wheel and comprising a part of a single flexible power operated means common to all the door operating mechanisms.

32. Elevator door controlling means comprising a motor, normally inoperative power operated means extending through the elevator shaft and movable in opposite directions by said motor, door operating mechanism at each floor, means for connecting any door operating mechanism with said power operated means, and means including frictional driving means for causing a pre'- determined moveinent of said door in the selected direction and then throwing said power operated means out of operation.

33. In apparatus of the class described,,in combination with an elevator car and a hatchway serving several floors, a pair of doors 'for said hatchway at each floor ar ranged to move vertically in opposite directions to open and close the hatchway opening, flexible members connecting said doors arranged to operate one of said doors simultaneously with the other door through movement imparted to the latter door, means under control 'of the operator for automatically opening or closing a selected door, said means comprising a reversible electric motor and power transmittin means driven thereby in each direction an extending through the elevator shaft, electrical mechanism under control of the operator for causin r the connection of a pair of doorsat a sciscted floor with said power transmitting means to move the doors in either direction and means comprising automatically operated switches for interrupting the motor circuit when the doors reach their limits of movement in either direction. 34. In apparatus of the class described, an elevator shaft and a gate for each of several floors, each gate having a sprocket gear, a friction clutch and connections to said gate whereby, when said clutch is thrown, said gear is connected to operate the ate, a motor, with chain extending vertically throu h the elevator shaft and common to all t e gates and always connected with each sprocket, means under control of the o erator of the car to start the motor and t row in the clutch only of the gate adjacent to which the car then is iocated, and means operated in consequence of the movement of said chain and operating automatically to stop the motor when the door reaches one limit of movement, and means for disconnectin said clutch.

35. n apparatus of the class described, an elevator shaft and a gate at each of a plurality of floors, a reversible motor and gate operating means driven thereby and extending down through the elevator shaft and common to all the gates, means arranged to connect to said gate-operating means only the gate of any selected floor to open the same and only when the car is adjacent that floor and automatically to cut out the motor when the gate is fully opened, an operators button in the car and connections operated thereby arranged to reverse the motor and thereby cause said motor to drive the gate in the opposite direction, means to disconnect the gate and means automatically to stop the motor when the gate is fully closed, and another operators button in the car and connections operated thereby for repeating the opening 0' eration, at the will of the operator, where y the gate may, after the first opening movement, be opened and closed by the said buttons at the will of the operator as many times as desired while the car remains at the floor.

36. In combination, an elevator shaft and car, a ate at each of several floors, and means or operating said gates comprising a motor common to the gates and mechanism arranged to connect any gate thereto whereby the motor may drive the gates in both the opening and closing directions, buttons in the car and circuits which control open and close magnets which operate switch gate rcarhcs either liniil oi movcnwrdi; all arranged and opcratinn m that the operator may cause the motor to drive the gate in either direction from suhstantially any pairtiallyopcn position thereof, and, so long as the car remains at the floor, may open and rloso the gate as often as desired.

37. In ronihination. an elevator shaft and car. a substantially hahtnrcd gate at each of several floors and means for operating said gates comprising :1 motor common to the gates and mechanism arranged to connect? any gate thereto whcrchy the motor may drive the gates in hoth the opening and closing directions. hnttons in the car and eir cuits which control open' and close" mag nets which operate switch mechanism arranged to cause the motor to drive the gates in either direction dtsired. mechanism in part moved correspondiugly with the move mcnt oi the car and arangcd to render the said buttons and magnets upcntivo to move any gationly \vhcn tho car is adjarent that gate; and directional sn'it hcs common to all the gates and also controlling the. circuits through said magnets: and nnw-hanisnn in part moved corrcs uindingly with the operated gate. arranged to operate one of said switches to slop the gate when the gate reaches either limit of movement: all arranged and operating so that the operator may cause the motor to drive the gate in either direction from snhst'antialiy any liartiinily-opcn position thereof. and. so long; as the car remains at the lloor may open and close the gate as oltcn as desired.

38: In cotnhinatiotn an elevator shaft and car, a gate at each of several floors. and means for opcratin; said gates comprising :1 motor common to the gates and n'icchanism, including a clutch for each gate and mechanism cmltrollingthe clutches and controlled by an eieclrio magnet common to all arranged to conncct. any gate thereto wherchy the motor may drive the gates in hoth the opening and closin directions. buttons in the car and circuits which control open and close magnets which operate switch mechanism arranged to cause the motor to drive the gates in either direction desired, mechanism in part moved cmrcspondingly with the movement of the cat rind arranged to render the said buttons and magnets operative to move any gate only when the our is adjacent that gate; and directional switches conmion. to all the gates and also controlling the circuits through said magnets, and n'iechanisnn in part moved corresponii ngly with the operated rate. arranged to operate one of said switches to stop thixate when the gate reaches cithcr limit oi movement; ali arranged and operating so that the operator may cause the motor to drivo the gain in either direction from suhstantially any partially open position thereof. and, no long: as the mnremains at the door. may open and close the gate as often as desired.

ijlt. ln comhination, an elevator shalt; and car, a gate at each of several Iioors, and means for operating said r lics comprising a motor common to the gates and mechanism arranged to connect any gate thereto whereby the motor may drive the gates in both tho opening and closing directions, hutitons in the cal and circuits which control open' and ch-so magnets \vhirh operate switch nwchanism arranged to car-so the motor to drive the gates in either direction desired nn-rhanisni in iart moved correspondingly with the movement at the call and arranged to render the said hnltons and magnets operative to movo any nf-Lite only when the car is adjacent that gate, said mechanism comprising in part switch mechanism in tho magnet circuits automatically opened when the car starts a my from the Hour. and dircrt-ional switches common to all the gates and also controlling the circuits through said magnets; and incrhanisin, in part moved correspondingly with the operated gate arranged to ope'ato ono of said switchv, to stop the gate when the gate reaches ither limit of movement; all arranged and operating so that; tho operator may moor the motor to drive the gate in either diioi-tinn from suhstant-ially any partiallvonnn position thereof. and So long] as thr car remains at the floor. may open and t-lo o the gate as often as dcsircd.

it]. in con hination. an elevator shaft and car, a gate ,tl each of several floors. and means for rqwrating said gates comprising a motor common to the gates and mechanism arranged to connect any gate thereto uhcrclrv the m tor may drive the gates in hoth the opening and closing: directions, huttons in the ("l and circuits which control open and "close" magnets which operat switch mechanism arranged to cause tho mot or to drive the gates in either direction desircth mechanism in part moved correspondingly with the mm'ement oi the car and arranged to render the Said huttons and magnets operativo to move any gate only when the car is adjacent that gate: and directional switches common to all the gates and also controlling the circuits through said magnets; and mechanism, in part moved correspondingly with the operated gate, arranged its partially-open position and, so long as to operate one of said switches to stop the the car remains at the floor, may open and gate when the gate reaches either limit of close the gate as often as desired. a

movement; and another switch under con- Signed at New York city, N. Y., this 4th a grol ofh the operate; in thecar and oonltrolday of April, 1916.

'" ing t e' circiiits said magnets; al arranged and operating so that the operator RUMSEY SCOTT may stop the gate at substantially any point in its movement and then cause the motor 10 to drive the gate in either direction from Witnesses BEATRICE Mmvls, Cans. CLARK.

Cel 'tiflcate of Correction.

It is hereby certified that in Letters Patent "No. 1,467,692, granted September 11, 1923, upon the application of Rumsey W. Scott, of Montclair, New Jersey, for an imsrovement 1 n Elevator-Door-(ontrolling Meme," errors appear in the printe specification requiring correction as follows: Page 6, line 26, claim 8, for the word An reed In; same page, line 128, claim 13, strike out the word setting and insert the words the electromagnetic means 0;; same line, after the word and insert the worii for; and that the said Letters atent should be read with these corrections therein that the same may conform to the record of the case in the Patent Oflioe.

Signed and sealed this 30th day of October, A. D., 1923.

[emit] KARL FENNLNG,

Acting 0mm,- of 'Patenta. 

